Abstract
Seasonal rainfall amounts, directly responsible for availability of water resources on a specified area, are strongly dependent on the climate system. In order to highlight some features of such dependence, generally circulation indexes based on the difference in the sea level pressure between two geographic areas are taken into account. In the present study, the relationships between winter rainfall series observed in the Calabria region (southern Italy) and the North Atlantic Oscillation Index (NAOI) have been analysed. Firstly, a correlation analysis between precipitation and the NAOI was performed. Subsequently, the influence of the different phases of the NAO on the winter precipitation has been detected by a composite analysis, and by identifying changes in the behaviour of the probability density functions (gamma distribution) fitted on monthly rainfall. The results evidence a clear link existing between the phases of the climatic index and the amount of winter rainfall.
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Ferrari, E., Caloiero, T. & Coscarelli, R. Influence of the North Atlantic Oscillation on winter rainfall in Calabria (southern Italy). Theor Appl Climatol 114, 479–494 (2013). https://doi.org/10.1007/s00704-013-0856-6
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DOI: https://doi.org/10.1007/s00704-013-0856-6